解题方法
1 . 已知函数
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e593828316139a54019e352dec883f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801fbbc7dc155ff52ce94de60e44ce85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e593828316139a54019e352dec883f.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c57efb6bcba2df49eab9b170fed36484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571818aa4e492dad7b93992ea3ad920a.png)
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2 . 已知函数
.
(1)求曲线
在点
处的切线方程;
(2)设
,求证:当
时,
;
(3)对任意的
,判断
与
的大小关系,并证明结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38e2cfb9e16f2f5d7a1e9a7590dd073.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585de67a3fc494297d375d339af6d153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b79ae1ceee652b06fc889607ff3f1df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa38ca27c6c0c40d5e36b2ae4fb7ba7.png)
(3)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c975a637794e6be6dd95e1e1ba12620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa9fca7538f46d9d2b4429dd085ac78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fc8faefb26b233d4aa9dbef043aae.png)
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2023-06-18更新
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2卷引用:陕西省咸阳市实验中学2024届高三下学期适应训练(一)数学(理)试题
3 . 设直线
,曲线
.若直线
与曲线
同时满足下列两个条件:①直线
与曲线
相切且至少有两个切点;②对任意
都有
.则称直线
为曲线
的“上夹线”.
(1)已知函数
.求证:
为曲线
的“上夹线”;
(2)观察下图:
的“上夹线”的方程,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70087bf78bee970f6ecf583ca1fccc42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0016d106579d6b26cf2960cf744f317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9dc155203792c9983b2118b7730088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c043c3bf7b638f8bb635ee098130560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31c4f39399ec245a67db2933ed639f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)观察下图:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d08fe48eafb7a58cb673cc4bce2aa0e7.png)
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解题方法
4 . 已知函数f(x)
,g(x)=lnx-1,其中e为自然对数的底数.
(1)当x>0时,求证:f(x)≥g(x)+2;
(2)是否存在直线与函数y=f(x)及y=g(x)的图象均相切?若存在,这样的直线最多有几条?并给出证明.若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540547414909de221d530d7abb9d66bb.png)
(1)当x>0时,求证:f(x)≥g(x)+2;
(2)是否存在直线与函数y=f(x)及y=g(x)的图象均相切?若存在,这样的直线最多有几条?并给出证明.若不存在,请说明理由.
您最近一年使用:0次
2021-09-12更新
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899次组卷
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9卷引用:陕西省西安中学2021-2022学年高三上学期期中理科数学试题
陕西省西安中学2021-2022学年高三上学期期中理科数学试题江苏省南通市海安市2021-2022学年高三上学期期初学业质量监测数学试题宁夏银川一中2022届高三上学期第二次月考数学(理)试题四川省南充高级中学2021-2022学年高三上学期月考四数学(理)试题(已下线)专题36 盘点导数与函数零点的交汇问题—备战2022年高考数学二轮复习常考点专题突破重庆市南开中学校2023届高三上学期期末数学试题江苏省南通市海安高级中学2022-2023学年高二下学期期中数学试题重庆市荣昌中学校2024届高三上学期第一次月考数学试题福建省泉州市泉港区第一中学2023-2024学年高二下学期3月月考数学试题
5 . 设函数
的定义域为开区间
,若存在
,使得
在
处的切线
与
的图象只有唯一的公共点,则称
为“
函数”,切线
为一条“
切线”.已知函数
.
(1)求曲线
在点
处的切线方程;
(2)判断(1)中所求切线是否是函数
的一条“
切线”,并说明理由;
(3)当
时,求证:函数
为“
函数”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b359345c5afa1739bf5ebf8982e1d959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71764aaf4bec8018021e8734e2969bb.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2780d349d06892beec1ca81f1e765e.png)
(2)判断(1)中所求切线是否是函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b88e53e6ca674b4cb92ba78dddf989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
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解题方法
6 . “拐点”又称“反曲点”,是曲线上弯曲方向发生改变的点.设
为函数
的导数,若
为
的极值点,则
为曲线
的拐点.
已知曲线C:
.
(1)求C的拐点坐标;
(2)证明:C关于其拐点对称;
(3)设
为C在其拐点处的切线,证明:所有平行于
的直线都与C有且仅有一个公共点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7013f94a41df38d395aaa830559ae31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2848ae11c9a59b86a60f206f69efcb19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7013f94a41df38d395aaa830559ae31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7688fe159aac6cd2422b0f834e2b2338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c087cba6516cfb66c9d346df7e8a24b.png)
已知曲线C:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497260109e600d68e2a84b20d791de06.png)
(1)求C的拐点坐标;
(2)证明:C关于其拐点对称;
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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7 . 已知函数
.
(1)若
,求曲线
在
处的切线方程;
(2)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450918f30f3888867dd1ef71fa6f477f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ddfcf480159b9afe8319658bc6a0b7.png)
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8 . 已知函数
,曲线
在点
处的切线与
轴平行或重合.
(1)求
的值;
(2)若对
恒成立,求
的取值范围;
(3)利用下表数据证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410178c284d2027a2734a0b05aa0ac94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0a4109aa195543d6ffe940e6577d1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)利用下表数据证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4314b1f4aee01d15d3fbc6857fac4f17.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
1.010 | 0.990 | 2.182 | 0.458 | 2.204 | 0.454 |
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解题方法
9 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d685b7f2a5e121a9254d624aaa0379c2.png)
(1)若函数在
内点
处的切线斜率为
,求点
的坐标;
(2)①当
时,求
在
上的最小值;
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d685b7f2a5e121a9254d624aaa0379c2.png)
(1)若函数在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c195698ac387fe53b3b1e0248a1fcc92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6760d53501dc3d6b1b86bfed2e26d352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40fc63b39f3a0e7b7f99c38753846e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b30a66048110102ebfdc0f9e04a30f.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a6cece6b1376a1636c15ce15da8994.png)
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10 . 已知函数
.
(1)求曲线
在
处的切线方程;
(2)若
,且
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d023718e0e6724cfcdd4f6423730944.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a945357aa4d7cb2bd48c28af862a3078.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/859458471c86ae39e0cc42d2d960d03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ada28d365e8363aae387a32bf9ac70e.png)
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2024-05-27更新
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2卷引用:陕西省部分学校(菁师联盟)2024届高三下学期5月份高考适应性考试理科数学试题